Chemical Process
In the Lurgi coal gasifier

Low carbon conversion efficiency is achieved
Large quantity of coal can be processed
Entrainment of solids is higher
Coking coals cannot be used

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Chemical Process
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

Remove the coloring matter from the syrup
Adjust the pH of the syrup
Improve the rate of crystallisation of sugar
Reduce the viscosity of the syrup

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